Chemical composition and in vitro staining resistance of SmartTrack and ClearQuartz multilayered orthodontic clear aligners
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Autor:innen
Autor:in (Körperschaft)
Publikationsdatum
06.2025
Typ der Arbeit
Studiengang
Typ
01A - Beitrag in wissenschaftlicher Zeitschrift
Herausgeber:innen
Herausgeber:in (Körperschaft)
Betreuer:in
Übergeordnetes Werk
AJO - DO Clinical Companion
Themenheft
DOI der Originalpublikation
Link
Reihe / Serie
Reihennummer
Jahrgang / Band
5
Ausgabe / Nummer
3
Seiten / Dauer
249-259
Patentnummer
Verlag / Herausgebende Institution
Elsevier
Verlagsort / Veranstaltungsort
Auflage
Version
Programmiersprache
Abtretungsempfänger:in
Praxispartner:in/Auftraggeber:in
Zusammenfassung
Clear aligner therapy is a popular alternative to traditional metal braces because of its esthetic appeal and convenience. However, the chemical composition of these aligners is not well understood, and their resis tance to staining by coloring compounds present in the oral environment remains a concern. In this study, we aimed to analyze the chemical composition of multilayer aligner materials using chemical imaging and evaluate their staining resistance to common food and beverage items. The in vitro staining resistance of SmartTrack (Invisalign; Align Technology, Santa Clara, Calif) and ClearQuartz (ClearCorrect; Straumann Group, Basel, Switzerland) was tested by immersing the aligners in coffee, cola, red wine, and mustard for 24 hours. The color change was assessed using spectrophotometry. The aligners were analyzed using Raman microscopy to identify the chemical composition of the individual layers and relate them to staining resistance. Raman microscopy revealed that ClearQuartz consists of a soft elastomeric polyurethane layer
sandwiched between two polyester layers, whereas SmartTrack has the opposite configuration. ClearQuartz exhibited less staining in all the tested foods and beverages than SmartTrack, which showed marked stain ing in mustard and coffee. Stain uptake was primarily observed in the polyurethane layer, possibly because of its chemical affinity with the coloring compounds. Clinicians should consider the patients’ dietary habits and aligner material composition before recommending a clear aligner treatment. Aligners with polyure thane elastomer as the outer layer are not recommended for patients who consume food and beverages rich in colorants, such as coffee and mustard, as this may detrimentally impact patient satisfaction and compliance. (Am J Orthod Dentofacial Orthop Clin Companion 2025;5:249-59)
Schlagwörter
Fachgebiet (DDC)
Veranstaltung
Startdatum der Ausstellung
Enddatum der Ausstellung
Startdatum der Konferenz
Enddatum der Konferenz
Datum der letzten Prüfung
ISBN
ISSN
2666-4305
Sprache
Englisch
Während FHNW Zugehörigkeit erstellt
Ja
Zukunftsfelder FHNW
Publikationsstatus
Veröffentlicht
Begutachtung
Peer-Review der ganzen Publikation
Open Access-Status
Closed
Lizenz
Zitation
Salvatori, D., Bühler, T., & Birtel, S. (2025). Chemical composition and in vitro staining resistance of SmartTrack and ClearQuartz multilayered orthodontic clear aligners. AJO - DO Clinical Companion, 5(3), 249–259. https://doi.org/10.1016/j.xaor.2025.02.004